Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 11 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/24/2021   22:10:08   (  -0.05,-128.31) (  -0.71,-131.32)  342.36                80
 11/25/2021   21:54:01   (  -0.06,-128.29) (   0.25,-126.77)  172.64                80
 11/27/2021   10:13:09   (   0.03,-128.26) (   0.86,-132.05)  432.26                80
 11/28/2021   09:57:02   (   0.04,-128.24) (  -0.10,-127.51)   82.39                80
 11/30/2021   21:57:31   (  -0.03,-128.18) (  -0.08,-128.27)   11.42                80
 12/03/2021   10:00:32   (   0.02,-128.11) (   0.22,-129.01)  102.51                80
 12/04/2021   09:44:25   (   0.04,-128.08) (  -0.75,-124.47)  411.12                80
 12/05/2021   22:03:41   (  -0.01,-128.03) (  -0.40,-129.77)  198.69                80
 12/06/2021   21:47:34   (  -0.03,-128.00) (   0.57,-125.23)  314.69                80